34 Elm St - Traffic Assessment - Rev C

34 Elm St, Cooroy


changing shopping habits this later 2018 survey at Eli Waters is considered to be a more accurate
representation than the earlier 2007 surveys. Despite this site being larger than the proposed
development on Opal St, 360 Civil Consulting consider the Eli Waters site an acceptable
comparison site for determining the percentage of commercial vehicles that are likely to access
the development
The total daily vehicle count for the 7 day count at the Eli Waters Shopping centre was 7,325 vpd
(vehicles per day). The RTA guide to Traffic Generating Developments estimates that a shopping
centre with a GLFA of 6,074m2 is anticipated to generate 121vpd per 100m2 of GLFA. This would
equate to an anticipated traffic generation of 7,350 vpd. The difference between the measured
traffic count and the anticipated traffic count is less than 1% and hence it has been assumed that
this site is typical of the expected vehicles.
The percentage of Class 3 or Class 4 – 13 vehicles to the Eli Waters Shopping centre is 1% of all
vehicles.
Based on the RTA Guide to Traffic Generating Developments, the estimated total number of
vehicles to be generated by the development based on 658m2 of GLFA is 796 vpd.
From comparisons with Eli Waters Shopping centre, it is expected that 1% of these vehicles will be
commercial vehicles. Hence, it is expected that 8 vehicle movements per day will occur by a
commercial vehicle. Four of these movements will be entering the site via Opal St and 4
movements will be exiting the site via Diamond Lane.
As previously discussed, Cooroy Motel generated approximately 36 vpd to Diamond Lane, the
proposed development will generate 4 vpd to Diamond Lane. As such, the proposed development
will decrease the amount of traffic to the Diamond Lane / Elm St intersection by approximately 32
vehicle movements per day.
This reduction in vehicle movements at the Diamond Lane / Elm St intersection, alongside the
removal of the Cooroy Motel’s non-complaint access to Diamond Lane, will improve the safety and
functionality of the Diamond Lane / Elm St intersection.

 3.3 Diamond Lane Exit
It is proposed that the Diamond Lane access will be an exit left only for commercial vehicles. This
will minimise any adverse impact that commercial vehicles will have on any Diamond Lane
properties that are east of the development. To ensure that the access is exit only, a boom gate is
proposed to be located at the exit. This boom gate will have a control button in each of the shops
and will be used by shop staff to allow commercial vehicles to exit.
To ensure that the commercial vehicles exit to the left, it is proposed that a build out is
constructed at the north eastern boundary directing traffic left towards Elm St. The exact set out
details of this proposed build out will be completed as part of the Operational Works Application.

 3.4 Impacts on Diamond Lane
As detailed previously, Diamond Lane is approximately 210m in length and typically has a
pavement width of approximately 3.5m. The lane allows two-way traffic however has insufficient
room for vehicles to pass and does not contain formalised passing bays.


360 Civil Consulting - Traffic Assessment                                          Page 10 of 13